Shoe machines



J. P. CARTER SHOE MACHINES May 12, 1959 5 Sheets-Sheet 1 Filed Jan. 7,1957 May 12, 1959 J. P. CARTER SHOE MACHINES Filed Jan. 7, 1957 5Sheets-Sheet 2 May 12, 1959 J. P. CARTER 2,335,980

SHOE mcumzs Filed Jan. '7, 1957 5 Sheets-Sheet 3 luv 6 nfor' James PCarter SHOE MACHINES Filed Jan. '7, 1957 5 Sheets-Sh68t 4 James P Cartery 1959 J. P. CARTER 2,885,980

SHOE MACHINES Filed Jan. '7, 1957 5 Sheets-Sheet 5 Inventor James PCarter United States Patent SHOE MACHINES James P. Carter, Beverly,Mass., assignor to United Shoe Machinery Corporation, Flemington, N.J.,a corporation of New Jersey Application January 7, 1957, Serial No.632,865

Claims. (Cl. 112-52) The present invention relates to improvements inmachines for attaching welts to lasted shoe uppers and sole members, andmore particularly to machines having mechanisms for automaticallysevering the welt and for positioning the severed end in readiness tostart an operation on a new shoe. A machine of the particular typereferred to is disclosed in an application for United States LettersPatent, Serial No. 558,933, filed January 13, 1956, in the name of thepresent inventor.

The machine of the application above referred to is a Goodyear WeltInseam Sewing Machine equipped with a feeler controlled welt severingmechanism thrown into operation automatically by the leading end of thewelt first attached to a sewed heel seat shoe as the seam being insertednears completion. When a shoe having a Welt extending around theforepart only, from heel-breast line to heel-breast line, is beingoperated upon a feeler is useless for controlling the welt severingoperation, particularly for breast-to-breast work, there being nothingto actuate such feeler where the leading end of the welt first attachedto the shoe is not carried a second time across the sewing point.Accordingly, it is necessary in the machine of the prior application tomake certain adjustments and changes in the control parts, so that thewelt may be severed directly under the control of the operator at theproper point as the seam is being cornpleted.

An object of the present invention is to provide a shoe sewing machinewith conveniently controlled automatic welt severing mechanism operativealternatively, either upon shoes of the sewed heel seat type or uponshoes having welt attached about the foreparts only. Other objects areto improve the construction and mode of operation of mechanism forcausing a welt to be severed automatically and for advancing the severedwelt end across the point of operation in any type of shoe sewing orother fastening forming machine before starting a new seam and toprovide a simple form of alternative adjustment readily adaptable to allsewing conditions, so that the same machine may operate satisfactorilyupon either sewed heel seat or heel-breast to heel-breast work.

In accordance with the purposes outlined above, an important feature ofthe invention resides in a treadle controlled machine of the typereferred to, equipped with the usual stitch-forming, feeding, andguiding devices for shoe parts, automatic Welt severing mechanismincluding a welt severing knife, an electromagnetic solenoid foractuating the knife, a feeler for engaging the leading end of a weltalready attached to a sewed heel seat shoe, as that end approaches thestitch-forming devices, an energizing switch actuated by the feeler anda safety switch interposed in circuit with the energizing switch toprevent unintcntional operation of the severing mechanism, in whichmachine there is provided a separate treadle actuated,operator-controlled switch for energizing the solenoid when approachingthe end of a sewing operation for a shoe sewn only about its forepart.Preferably, a selector switch is connected in circuit with the treadle2,885,980 Patented May 12, 1959 'ice actuated switch for rendering thetreadle actuated switch effective to energize the solenoid or forrendering the treadle-actuated switch ineffective to energize thesolenoid. In one form of this feature the selector switch connects thesafety switch in circuit with the solenoid when the treadle actuatedswitch is ineffective. As hereinafter described, means under theoperators control also is provided for actuating the safety switch inadvance of the end of a seam to render one of the energizing switcheseffective to energize the solenoid, and a latch is provided forretaining the safety switch in circuit connecting position until thesolenoid circuit is completed by closing the energizing switch. Toprevent the welt from being severed unintentionally after the machine isrestarted, in this feature of the invention, means are provided forreleasing the safety switch from the latch when the solenoid isenergized.

In a further aspect of the invention, which is applicable to machinesequipped with both a foot treadle and a knee lever for controlling anoperation of sewing welts to lasted shoe uppers and insole members, andmore generally to other types of attaching operations, in which a kneelever is latched in actuated position during the operations and whilethe foot control treadle is depressed, connections are provided betweenthe latch and the treadle for releasing the safety switch from the latchwhen the treadle is raised to terminate the operations. As hereinafterillustrated, these connections are partly mechanical and partlyelectrical, the latch being moved to unlatching position by anelectromagnet energized through a switch actuated by the welt severingknife solenoid.

These and other features of the invention, as hereinafter described andclaimed, will be apparent from the following detailed specification andaccompanying drawings, in which Fig. l is a view in front elevation,partly broken away and reduced in height, of a welt shoe sewing machineembodying the features of the present invention;

Fig. 2 is a detail view partly broken away and reduced in height, on asomewhat enlarged scale, looking from the right side of a base of themachine shown in Fig. l and illustrating a control treadle and kneelever arrangement employed in the machine, the parts being shown whilethe machine is in stopped position;

Fig. 3 is a detail view showing the parts of the knee lever connectionsand a wiring diagram of the machine, with the parts illustrated inrunning position;

Fig. 4 is a similar view of the knee lever illustrating the positions ofthe parts when the control treadle is moved to machine stoppingposition;

Fig. 5 is a detail view partly in section looking from the right side ofthe machine of a portion of the stopping mechanism;

Fig. 6 is a sectional detail view illustrating the relationship of aneedle, awl, and welt severing knife while en gaging a feeler and achannel guide together with a shoe being operated upon by the machine;

Fig. 7 is a detail plan view illustrating the manner of operation of themachine on a sewed heel seat shoe; and

Fig. 8 is a similar detail view illustrating the manner of operation ofthe machine on a conventional Goodyear welt shoe to which a welt is sewnfrom heel-breast line to heel-breast line.

The machine illustrated in the drawings is a shoe inseam sewing machinesimilar to that disclosed in United States Letters Patent No. 1,971,575,granted August 28, 1934, and No. 2,041,945, granted May 26, 1936, bothupon application of Alfred R. Morrill, and also similar to that referredto in the present inventors co-pending' mounted for movement toward andfrom the welt as it passes through its guiding device, automaticmechanism for actuating the knife including an electromagnet, and afeeler mounted for engagement with the leading end of the welt alreadyattached to a shoe, as that end approaches the stitch-forming device.The machine of the application is primarily intended for operation upona shoe which has a welt sewn thereto throughout the length of its bottommarginal portions, including the heel seat of the shoe, so that the seamis completed by stitches overlapping the abutting ends of the welt.

As illustrated in Figs. 3 and 6 of the drawings, the parts of a shoeincluding an insole 6, an upper 8, and a welt 10 are operated upon bythe usual stitch-forming and feeding devices and the leading end,indicated at 12, of the welt first attached to the shoe, is engaged bythe feeler, indicated at 14, movable toward and from a position ofengagement by the welt end 12 during its feeding movement. When thefeeler 14 is engaged by the welt end 12, as that end approaches thestitch-forming devices, a welt severing knife 16 is projected againstthe welt running from a supply, at a position in advance of the sewingpoint in the machine where there is no danger of contact with parts ofthe shoe other than the welt by the knife during the sewing operations.The machine thus continues in operation for a sufiicient length of timeto insert one or more stitches overlapping the ends of the welt whichare brought into abutting engagement with each other.

The machine is thereafter brought to rest and the mechanisms are throwninto operation for advancing the end of the welt remaining in themachine across the point of operation of the stitch-forming devices inpreparation for starting an operation upon a new shoe.

In order to enable the machine of the prior application to operate upona conventional Goodyear welt shoe, in which the welt is attached to theinsole and upper about the forepart only of the shoe from heel-breastline to heel-breast line, it is necessary to render the welt end feelerinoperative and to make a number of other adjustments which may bediflicult and time consuming. Also, after such adjustments are made itis necessary in sewing a Goodyear welt shoe from heel-breast line toheel-breast line only, for the operator to gage accurately the positionalong the welt at which it is to be severed and, also thereafter, tobring the machine to rest with a short length of the welt remainingunattached to the shoe, so that a welt butting operation may readily beperformed without requiring an excessively long length of welt to besevered from the shoe and wasted.

For the purposes of avoiding the necessity for the operator to estimatethe proper position for severing the welt in a conventional Goodyearwelt shoe with the best results, for bringing the machine to rest withthe proper length of welt remaining unattached to the shoe, and forsimplifying the adjustments required when transforming the machine froma condition where it is adapted for sewed seat Work to a condition whereit is adapted for breast-to-breast work, the machine of the presentinvention is equipped with an improved arrangement of controlconnections. The improved control connections comprise a member capableof being displaced by the operator of the machine for causing the weltsevering knife to be actuated independently of the engagement of thewelt on a shoe by the feeler. In the preferred constructionalternatively operable means is provided for enabling a simple shift tobe made from a condition of automatic control by the feeler to acondition requiring the operator displaceable member to be actuated insevering the welt. The improved connections also include a safety switchsimilar to that employed in the machine of the prior application whenthe machine is utilized for sewed seat work.

Referring to Figs. 6 and 7, the action of the machine is illustrated insevering the welt at the end of a sewed .4 seat inseaming operation. InFig. 8 a conventional Goodyear welt shoe which has the welt attachedfrom heel-breast line to heel-breast line is illustrated. In sewed heelseat work the welt severing operation is controlled by the engagement ofthe leading end portion 12 of the welt, first attached to the shoe withthe welt end feeler 14 secured by a screw 18 (Fig. 3) to a lever 20 andpressed yieldingly against the leading end already attached to theinsole by stitches starting as close as possible to the leading end. Assoon as the leading end 12 of the welt engages the feeler 14 the knife16 severs the welt between the shoe and the supply as the welt passesthrough its guiding devices, leaving a short on attached lengthprojecting from the shoe a distance equal to that between the lastformed stitch and the leading end 12, the knife being arranged to form abeveled cut matching that on the leading end 12.

When the machine is to be transformed to a condition where it is adaptedfor breast-to-breast work, illustrated in Fig. 8, adjustments are madeto cause the first stitch of a seam to be inserted in the welt at somedistance from the leading end 12, as shown in Fig. 8, rather than closeto the leading end, as in Fig. 7. By so doing, a suitable length ofunattached welt is supplied for a later performed welt butting operationto enable the welt at its ends to be fitted smoothly to a heel.Correspondingly, the same length of unattached welt is required at thatend finally attached to a shoe, it being unnecessary to insert stitchesacross the final end, indicated at 22, as in sewed seat work. For thisreason it is desirable to delay stopping the machine after severing thewelt in sewed seat work. Delayed stopping of the machine causes the seamto continue until several stitches are inserted across the joint betweenthe leading and final ends of the welt.

To attach the parts of the shoe the machine is equipped with the usualchain-stitch forming, work feeding, and guiding devices, including acurved hook needle 24 (see Fig. 6), an awl 26, a channel guide 28, aneedle looper (see Fig. 1), a back rest 32, a sewing welt guide 33 andother devices constructed and operating in the same manner as shown inthe above-mentioned patents, No. 1,971,575 and No. 2,041,945. Thestitch-forming and other devices are actuated by a main sewing cam shaft34, provided at its left end with a hand wheel 36.

Driving and stopping mechanisms for the sewing shaft also are provided,including a vibrating lever 38 (see Fig. 5), a lock bolt 40 mounted forvertical sliding movement in a horizontally yielding carrier 42, andother manually controlled and automatic connections operated by thesewing shaft 34 for bringing the machine to rest. The driving andstopping mechanisms are controlled in part by the operator and in partby the automatic connections which are thrown into operation to stop themachine with the needle retracted from the work and free of sewingthread. Control of the driving mechanism is exercised by the operatorthrough displacement of a control treadle 44 (Figs. 1 and 2) which isheld yieldingly in a raised position by a spring 45, the machine beingstarted by a downward pressure on the treadle and brought to rest at itspredetermined stopping position when the treadle is released.

The mechanism for actuating the welt severing knife 16 includes anelectromagnetic solenoid 46 (see Figs. 1 and 3) having a centralreciprocating armature 48 (Fig. 3) directly connected to the knife. Toretract the armature 48 after the solenoid is de-energized, the armaturehas connected to it the lower end of a spring 50 (Fig. l) stretchedbetween the armature and a fixed part of the machine. When the solenoidis energized, the armature is drawn downwardly with sufficient rapidityto cause the knife 16 to sever the welt while the machine is runningwithout interfering with the operation of the machine in other respects,so that when the feeler engages the leading end of the welt, it ispossible to continue a sewed heel seat sewing operation withoutinterruption across the joint in the welt.

The feeler 14 is operativey connected to a solenoid energizing switch 52in a manner more specifically illustrated and described in inventorsprior application, Serial No. 55 8,933. Briefly, the connections betweenthe feeler 14 and the energizing switch 52 include the lever 20 on whichthe feeler is mounted, a horizontal link 54 connecting the lever 20 anda downwardly extending arm on a lever 56 provided with a 'pin 58. Thefeeler mounting lever 20 is rotatable on a fixed stud 60 upon which acarrier plate 62 also rotates. The carrier plate 62 supports a pin 64forming a fulcrum for the lever 56. The pin 58 in the lever 56 is sodisposed that when the carrier plate 62 is swung about the stud 60 thepin moves into a position in alinement with the actuating button on theenergizing switch 52 and at the same time the feeler 14 moves into aposition where it will be actuated by the leading end 12 of the welt asthat end approaches the point of operation of the stitch formingdevices. As soon as the leading end 12 of the welt engages the feeler,it causes the pin 58 to be moved still further and against the button ofthe energizing switch 52, the electrical circuit through the energizingswitch thereby being closed. When the carrier plate 62 is in theposition shown in Fig. 3, the feeler 14 can no longer be actuated by theleading end of the welt, the feeler then being in a safe or inoperativeposition.

To bring the feeler 14 into an active position, connections more fullydescribed in inventors prior application, between the carrier plate 62and a knee lever 65 actuated by the operator are thrown into operation.These carrier plate connections include a link 66 pivotally connected atits left end to the carrier plate 62 and at its right end to an arm 68(see Fig. 1) secured to a shaft 70 having fixed to it a second arm 72pivotally connected to a cable 74 running downwardly past grooved Wheels76 to a point of connection with a horizontal arm of the operatordisplaceable member comprising a bell crank 78 (see Fig. 3) fulcrumed ona fixed bracket 80. A vertical arm of the bell crank 78 is connectedthrough a horizontal link 82 to a pin 84 in the knee lever 65 rotatablymounted for limited movement about a fixed pin 86 and provided with aknee pad 88 disposed in a position for convenient engagement with theleg of an operator standing in front of the machine.

As a further means to prevent unintentional operation of the weltsevering knife, the operator displaceable bell crank 78 carries a screw90 which is movable toward and from engagement with a safety switch 92interposed in circuit with the feeler actuated switch 52. Through theconnections thus described, a safety release of the feeler 14 fromactive position is provided and the electrical circuit, including thefeeler actuated energizing switch 52 and the solenoid 48, is normallymaintained disconnected from a main power supply line 94 (Fig. 3), theterminals of which are mounted on the machine.

The usual procedure followed when operating upon sewed heel seat shoesis to press the knee pad 88 rearwardly just before the leading end 12 ofthe welt is observed to approach the point of operation in thestitchforming devices. Depressing the knee pad moves the feeler 14 andthe pin 58 into active positions so that the feeler when engaged by theleading end of the welt may close the switch 52. As soon as the feeleris engaged by the leading end of the welt, the welt is severed and themachine continues in operation until welt attaching stitches areinserted across the joint between the leading and final ends of thewelt. Thereupon, the operator raises his foot from the control treadle44 and the machine is brought to rest. As the machine is brought to restthe welt advancing mechanism, more fully disclosed in inventors priorapplication, transports the end of the welt remaining in the machineacross the point of operation of the stitch-forming devices to aposition where it will be engaged by the needle as a new sewingoperation is started.

To enable the machine of the prior application to operate onconventional Goodyear welt shoes, in which the welt is attached to theinsole and upper along the forepart of the shoe from heel-breast line toheel-breast line, the energizing switch 52 is held closed so that thewelt severing knife will be actuated merely by closing the safety switchwhenever the knee pad 88 is pressed regardless of the position of thefeeler 14. For this purpose there is located for selective movementtoward and from the feeler controlled energizing switch 52, as in theprior machine, an interponent arm 96 (see Fig. 3) having a cam surfaceto depress the button of the energizing switch. The interponen't arm 96is moved away from the button of the energizing switch 52 whileoperating upon sewed seat work. When sewing breast-to-breast shoes theinterponent arm 96 is moved to the position of Fig. 3 where it closesthe switch 52 and blocks the movement of the pin 58 toward the switchand thus holds the feeler out of engagement with the welt on the shoe.

in sewing conventional Goodyear welt shoes about the forepart fromheel-breast line to heel-breast line only, in the machine of the priorapplication, it is necessary for the operator of that machine to pressthe knee pad 88 to actuate the safety switch 92, energizing the circuitto the solenoid 46 and at the same time that the knee of the operatorsleft leg is being utilized for this purpose, his left foot is raised torelease the control treadle 44. In so doing it has been found that theoperators knee is subject to injury, the skin being abraded by thereleasing movement of the control treadle while pressure is beingapplied to the knee pad 88. To avoid the danger o injury to theoperators knee and to facilitate control of the machine in otherrespects, the necessity 1" or holding the knee pad 88 pressed whilereleasing the foot treadle 44 in operating upon heel-breast line toheel-breast line shoes has been eliminated.

According to the present invention a separate operator controlledenergizing switch is provided in place of the feeler actuated switch 52for connecting the knife actuating solenoid in circuit with the mainline 94 when sewing a shoe with welt attached to its forepart only. Theoperator controlled energizing switch is indicated at 98 (Figs. 1 to 4,inclusive) and is mechanically connected to be actuated upon the releaseof the operatorcontrolled treadle 44 rather than upon the movement ofthe knee pad, the safety switch being held closed mechanically after theknee pad is depressed. However, the knee lever is still employed tocontrol a safety release for the knife actuation. Thus, the weltsevering knife is not actuated in case it is necessary to bring themachine to rest before the end of the seam attaching a welt to a shoe isreached. Avoiding actuation of the welt severing knife in this manner isof particular benefit where thread breakage necessitates stopping themachine at an intermediate part of the seam or where repair work on ashoe is being performed.

To avoid the possibility that the operator-controlled switch 98 willcause the welt severing knife to be actuated unintentionally whenoperating upon sewed seat shoes. the circuit to the switch 98 hasinterposed in it a selector switch 100, which is of the two pole doublethrow type, one of a set of poles being connected by a wire 102 with theoperator-controlled switch 98 and one of a set of poles being connectedby a wire 104 with the safety switch 92. The safety switch, however, isconnected through a lead 106 to the positive side of the line 94. Thus,the selector switch is in circuit with the safety switch for closing thecircuit thereto or for connecting the operator-controlled switch 98directly with the solenoid circuit through a wire 107, running through aconductor 108, passing through a test switch 110 when in its solid lineposition, the feeler control switch 52, the solenoid 46 and the negativeside of the line 94.

To hold the safety switch 92 closed after the knee pad is pressedrearwardly so that it is no longer necessary for the operator of thepresent machine to subject himself to injury as the foot treadle 44 isreleased, the lower extremity of the vertical arm in the bell crank 78forms a pawl engaging a tooth on a latch 112 (see Fig. 2). The latch 112is rotatably mounted on a pin 114 secured in a down wardly extendingbracket 116 on the frame of the machine. The bracket 116 has secured toits lower end an arm 118 on the upper surface of which is mounted asolenoid 120, having an armature 122 movable vertically therein. Thearmature 122 is connected through a link 124 with the forward end of thethe latch 112 in such a way that when the solenoid is energized thelatch is disengaged from the vertical pawl arm of the bell crank 78. Tomaintain the latch in engagement with the pawl arm. a spring 126 isstretched between a pin on the latch and a pin on the link 82 just aboveit. As soon as the latch is released from the pawl arm, the bell crank78 is released and actuated in a clockwise direction, as viewed in Fig.2 through the action of a spring 128 connected to a hook on the verticalarm of the bell crank 78 and one end of the pin 86. Release of the pawlarm on the bell crank 78 enables the safety switch 92 to open after thewelt has been severed and before the machine is brought to rest, so thatthe safety switch is returned to safe position ready for the machine tostart an operation on a new shoe.

To energize the latch releasing solenoid 120 the armature 48 of theknife actuating solenoid has formed on it a cam enlargement 130 (Fig. 3)acting on a roll 132 on a horizontal arm of a lever 134 whenever theknife actuating solenoid is energized. The lever 134 is fulcrumed on astud 136 projecting from the machine frame and has an upwardly extendingarm, in which is fixed a screw 138. The upper end of the screw 138cooperates with a spring actuated switch 140, one terminal of which isconnected to a conductor 142 running to the latch releasing solenoid120, and the other terminal of which is connected to a conductor 144running to the positive side of the line 94. The operation of the safetyswitch and the energization of the knife actuating solenoid, thusdescribed occur while the selector switch 100 is shifted either to aclosing position marked BB between the conductors 102 and 108 or to aclosing position marked S-S" between the conductors 104 and 107.

To actuate the operator controlled energizing switch 98 whenever thefoot treadle 44 is released by the oper ator, the foot treadle ispivotally connected to the lower end of a rod 146, the upper end ofwhich is pivotally connected to a cam arm 148 rotatably mounted on ashaft 149 secured to the operator-actuated knee lever 65. The free endof the cam arm 148 is arranged to engage a roll 150 on a lever 152rotatably mounted on a pivot 154 (Fig. 3) fixed in an angle plate 156secured to the bracket 116 (see Fig. 2). A vertical arm of the lever 152is movable toward and from the operatorcontrolled energizing switch 98and when the cam arm engages the roll 150 the energizing switch 98 isclosed. Engagement of the cam arm 148 with the roll 150 can occur onlywhen the knee lever 65 is pressed rearwardly and retained in rearwardlypressed position by the latch 112 engaging the pawl arm of the bellcrank 78. Thus, the mounting of the cam arm on the shaft 149 carried bythe operator actuated knee lever 65 serves in place of a safety switchin preventing actuation of the welt severing knife at all times duringoperation of the machine, except when a sewing position is reached on ashoe just in advance of a seam end. At this time the operator pressesthe knee pad 88 rearwardly to bring the cam arm into the range of thecam roll 150, so that the welt knife solenoid 46 may be energized. Atall other times the cam arm is held away from the roll 150.

In order to insure that the final stitches of a seam will be insertedoverlapping the abutting ends of the welt, so

that a secure attachment of the welt ends to the shoe will be obtained,the driving and stopping mechanism of the illustrated machine isprovided with a counting mechanism illustrated in Fig. 5. The lock bolt40 in the driving and stopping mechanism is connected through a link 158with one arm of a three-armed lever 160 having a cam surface on one armengaged by a roller 162 on one end of a shaft 164. The three-armed lever160 is rotat ably mounted on a screw 165 threaded into the machineframe. The shaft 164 has fixed to one end an arm 166, to which the upperend of a driving and stopping control treadle rod 168 is pivotallyconnected, the lower end of the rod 168 being similarly connected to thetreadle 44. At the end of a seam the control treadle 44 is released andin the machine of Patent No. 1,971,575 the lock bolt immediately engagesan opening in the vibrating lever 38, causing the sewing shaft 34 to bebrought to rest in predetermined stopping position after insertion of asingle stitch. In the present machine, however, the lock bolt 40 isdelayed in its upward movement toward the vibrating lever 38 by acounting pawl 170 pivotally mounted at 172 on a plate 174 clamped to thelower end of the lock bolt. The upper end of the pawl 170 is arranged toengage the end surface of the vibrating lever 38 when the treadle 44 isreleased. In the prior machine the lock bolt is delayed in its upwardmovement into the vibrating lever for at least one full rotation of thesewing shaft 34 so that one additional complete stitch is insertedbefore the present machine stops. Thus, with the counting pawl twostitches are inserted after the welt is severed and the treadle 44 isreleased. With the machine adjusted to insert stitches of normal lengththe distance between the severing position of the knife and the sewingpoint is less than two stitches, so that the final stitch is certain tocross the ends of the welt.

To insure that the pawl 170 will not release the lock bolt 40 before asecond stitch has been inserted, the upper end of the pawl has a notch176 arranged to be engaged by the lower rear corner of the vibratinglever 38 during the second vibration thereof. The pawl 170 is drawnforwardly against the vibrating lever by a spring 178 stretched betweenthe pawl and a pin on a fixed part of the machine frame, so that theupper notched end of the pawl always engages the vibrating lever 38before the lock bolt 40 does. During the first vibrating movement of thevibrating lever 38 after being engaged by the pawl, a spring 188surrounding the lock bolt and acting between the upper end of the lockbolt and a counterbore in an opening which receives the lock bolt causesthe pawl 170 to move upwardly until its upper end engages the undersideof the vibrating lever. Rearward movement of the vibrating lever thenenables the pawl to rise to the broken line position of Fig. 5 and a dog182 moves behind a hooked extremity at the lower end of the pawl 170.During the next succeeding forward movement of the vibrating lever thepawl is entirely released from engagement with the under surface of thevibrating lever 38 so that the lock bolt 40 may enter the opening of thevibrating lever 38. The dog 182 is rotatably mounted on a pin 184projecting from a block 186 clamped by a bolt 188 to a horizontal bar190. The bar 190 is secured at its ends by screws 192 to the machineframe and has at its upper edge an eccentric pin 194 against which thedog 182 rests yieldingly. To maintain the dog in engagement with theeccentric pin 194 a rearwardly extending finger on the dog is connectedto a tension spring 196 stretched between it and a fixed point on themachine frame. The arrangement is such that after the vibrating lever 38engages the notch in the upper end of the pawl 170 and the pawl reachesthe broken line position, the hooked lower extremity of the pawl movesinto line with the forward end of the dog 182. The hooked extremity onthe pawl then engages the dog 182 holding the pawl in the broken lineposition while the vibrating lever 38 moves forwardly, thus releasing 9.the pawl from the vibrating lever 38 and the lock bolt 4|) movesupwardly. The lock bolt 4|] then enters the opening in the vibratinglever and the machine is brought to rest after two stitches have beeninserted, at least one of which stitches crosses the joint between theends of the welt in a sewed seat shoe.

The nature and scope of the invention having been indicated and aparticular embodiment having been described, what is claimed is:

l. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitchforming devices, a mainpower line, a feeler actuated en.- ergizing switch for connecting themain line with the solenoid, a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, and driving and stopping mechanisms for the machineincluding a treadle, in combination with means including anoperator-controlled solenoid energizing switch connected to the treadlefor completing the circuit through the solenoid from the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt it attached about the forepart only.

2. A machine for manufacturing shoes with a Welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as, that end approaches the stitch-forming devices, amain power line, a feeler actuated energizing switch for connecting themain line with the solenoid, a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife and driving and stopping mechanisms for the machineincluding a treadle, in combination with means including anoperator-controlled solenoid energizing switch connected to the treadlefor completing the circuit through the solenoid from the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt is attached about the forepart only, and a selector switch incircuit with the operator-controlled switch for rendering theoperatorcontrolled switch effective to close the solenoid circuit or fordisconnecting the operator-controlled switch from the solenoid whensewing a shoe in which the welt is attached throughout the marginalportions including the heel seat.

3. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats, or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforrning, feeding and guiding devices for the shoe parts. a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitch-forming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintew tional operation of thewelt severing knife, in combination with means including anoperator-controlled solenoid energizing switch for connecting thesolenoid with the main line to cause the welt to be severed by the knifewhen sewing a shoe in which the welt is attached about the forepartonly, and a selector switch in circuit with the operator controlledswitch for rendering the operator controlled switch effective orineffective to close the solenoid circuit and to connect the safetyswitch in circuit with the solenoid when the operator-controlled switchis rendered ineffective.

4. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding de vices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, 21 feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitch-forming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, in combination with means including a solenoidenergizing switch for connecting the solenoid with the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt is attached about the forepart only, means displaceable by theoperator for actuating the safety switch in advance of the end of a seamto render one of the energizing switches effective to energize thesolenoid, and a latch for retaining the safety switch in effectiveposition.

5. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts. a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices. mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the switchforming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, in combination with means including anoperator-controlled solenoid energizing switch for connecting thesolenoid with the main line to cause the welt to be severed by the knifewhen sewing a shoe in which the welt is attached about the forepartonly, means displaceable by the operator for actuating the safety switchin advance of the end of a seam to render one of the energizing switcheseffective to energize the solenoid, a latch for retaining the safetyswitch in activated position, and means for releasing the safety switchfrom the latch when the solenoid is energized.

6. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitchforming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, in combination with means including a solenoidenergizing switch for connecting the solenoid with the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt is attached about the forcpart only, means displaceable by theoperator for actuating the safety switch in advance of the end of a seamto render one of the energizing switches effective to energize thesolenoid, a latch for retaining the safety switch in effective position,a treadle for controlling the operation of the machine, an arm connectedto the treadle for actuating the solenoid energizing switch, and meansactuated from the solenoid for releasing the safety switch from thelatch.

7. A machine for manufacturing shoes with a welt attached throughout themarginal portions including their heel seats or, alternatively, with awelt attached about their foreparts only said machine havingstitch-forming, feeding and guiding devices for the shoe parts, aweltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the weltsevering knife including a solenoid having an armature connected to theknife, a feeler for engaging the leading end of the welt alreadyattached to a sewed heel seat shoe as that end approaches thestitch-forming devices, a main power line, a feeler actuated energizingswitch for connecting the main line with the solenoid and a controltreadle for starting the machine when depressed and for stopping it whenreleased, in combination with means including an energizing switch forconnecting the solenoid with the main line to cause the welt to besevered by the knife when sewing a shoe, in which the welt is attachedabout the forepart only, an operator displaceable lever, an arm pivotedto the lever and movable by the operator displaceable lever toward andfrom a position Where the solenoid energizing switch may be actuatedwhen the control treadle is released, and a connection between the armon the operator displaceable lever and the control treadle for movingthe arm into a position where the operator controlled energizing switchis actuated when the control treadle is released.

8. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the weltsevering knife including a solenoid having an armature connected to theknife, a feeler for engaging the leading end of the Welt alreadyattached to a sewed heel seat shoe as that end approaches thestitch-forming devices, a main power line, a feeler actuated energizingswitch for connecting the main line with the solenoid and a controltreadle for starting the machine when depressed and for stopping it whenreleased, in combination with means including an energizing switch forconnecting the solenoid with the main line to cause the welt to besevered by the knife when sewing a shoe, in which the welt is attachedabout the forepart only, an operator displaceable lever, an arm pivotedto the lever and movable by the operator-displaceable lever toward andfrom a position where the solenoid energizing switch may be actuatedwhen the control treadle is released, a connection between the arm onthe operator displaceahle lever and the control treadle for moving thearm into a position where the operator-controlled energizing switch isactuated when the control treadle is released, and a latch for retainingsaid arm in a position where the operator-controlled energizing switchmay be actuated.

9. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts, a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitchforming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, in combination with means including a solenoidenergizing switch for connecting the solenoid with the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt is attached about the forcpart only, means for retaining thesafety switch in circuit connecting position. and a treadle controlledby the operator and connected to actuate the operator controlledenergizing switch when the treadle is released.

10. A machine for manufacturing shoes with a welt attached throughouttheir marginal portions including their heel seats or, alternatively,with a welt attached about their foreparts only, said machine havingstitchforming, feeding and guiding devices for the shoe parts. a weltsevering knife mounted for movement toward and from the welt as itpasses through the guiding devices, mechanism for actuating the knife,including a solenoid and an armature connected to the knife, a feelerfor engaging the leading end of the welt already attached to a sewedheel seat shoe as that end approaches the stitchforming devices, a mainpower line, a feeler actuated energizing switch for connecting the mainline with the solenoid and a safety switch interposed in circuit withthe feeler actuated switch to prevent unintentional operation of thewelt severing knife, in combination with means including a solenoidenergizing switch for connecting the solenoid with the main line tocause the welt to be severed by the knife when sewing a shoe in whichthe welt is attached about the forepart only, means for retaining thesafety switch in circuit connecting position, and a treadle controlledby the operator and connected to actuate the operator controlledenergizing switch when the treadle is released, and means actuated bythe solenoid armature for releasing the safety switch from its retainingmeans.

References Cited in the file of this patent UNITED STATES PATENTS1,774,498 Ashworth et al Sept. 2, 1930 2,151,438 Pierce Mar. 21, 19392,282,200 Neuman May 5, 1942 2,705,466 Sal-grove et al. Apr. 5, 1955

